Sheave block



MSNM

July 3l, 1923- E. D. SWAN ET AL SHEAVE BLOCK INVENTORS Patented duly El,i223.

Price,

ERVIN D. SWAN, F EAST ORANGE. NEW JERSEY, .AND lDUFE G, MANGES, 0F MARY-VILLE, TENNESSEE, ASSIGNORS, BY

:DIR-ECT AND MESNE 'ASSTGNMENT 0F ONE-HALE TO LIDGER'WOOD MNUFACTURNGCOMPANY, OF NE YORK, 'N'. Y., .A CRORATION OE NEW YORK, AND ONE-HALE TO`UNTED STEEL BLOCK COR- PORATTON, OE. CHESTER, EEI'INSYLVANIA, ACORPORATION OE l)EZKJJWAB,ll.y

SEEAV E BLOCK.

Application filed April 23, 1921. Serial No. 463,766.

'0 all 'whom it may concern.'

Be it known that we, lBRvrN D. Swan and D'Urr G. Marions, citizens ofthe United States, and residents of East Orange, in the county of Essexand State' of N ew Jersey, and Maryville, in the county of Blount andState of Tennessee, respectively, have invented certain new and useful,improvements in Sheave Blocks, of which the following is aspecification.

Uur invention more particularly relates to a sheave block in whichprovision is made for continuously and effectively llubric-ating thebearing surface for the sheave and liltering the lubricant.

Uur invention will best be understood. by reference to the accompanyingdrawings, in which Figure 1 is a side view of a sheave block embodyingour invention; Fig. 2 is'an end view partially broken away; Fig. 3 is across section taken through the axis of the bearin in Fig. 1, and Fig. 4is a fragmentary longitudinal section taken axially through the bearingmember and broken away to show the bearing sleeve in elevation.

Like reference characters indicate like parts throughout the drawings.

Referring, now, to the drawings, we have illustrated our invention in asheave block in which the frame comprises two side plates which arepreferably provided with inwardly extending registering hub members 11,as best shown in -Fig. 3. rlhe hub members are provided with a centralopening 12 in which is received a retaining bolt 13 provided with aclamping nut lll. fr clearance space 15 is preferably provided betweenthe hub members 11, asv shown in Fig. 3. 'lhe upper ends of the plates10 may be clamped together by bolts 16, as best shown in Fig. 1. Theframe of the sheave block is supported by means of a swivel eye 17, theshank 18 of which is received in a socket 19 formed in the plates l0 ina known manner, the lower end of the shank being provided with asupporting head 20.

The hub members 11 are preferably surrounded by a bearing sleeve 21 madeof anti` friction metal, such as-bronze. rlhe sleeve 21 is fixed inposition around the hub by means of pins 22, the ends of which arereceived in registering openings in the ends of the sleeve 21 and in theplates l0, respectively, the sleeve at the same time serving as aspacing member for the side plates 10.

A. sheave 2e is provided with a central cylindrical bearing aperturesurrounding the sleeve 21, as best shown in Fig. 3, and is provided witha chamber 25, preferably annular, for the reception of a lubricatingmaterial, such as oil, which may be introduced through an opening 2o-(see Eig. 1). The chamber 25 communicates with `the bearing 21 by meansof a passage 2'?, preferably annular, and preferably be-velled inwardlytowards f the bearing member, as at 28. A pad or ring 29 of felt orother fibrous yielding material is located in the passage 27 between thechamber 25 and the bearing. This ring is preferably formed originallywith a rectangular cross section and of a width corresponding to thegreatest width of the passage 27. The ring so formed is compressedwithin the passage 27 and when so compressed, and formed of a resilientmaterial as described, the ring tends to bulge inwardly towards thebearing member 21 and thereby make good contact therewith. lt will rbeunderstood that when the sheave is rotating rapidly there will be atendency to throw the lubrieating material by centrifugal forceoutwardly away from the felt ring. hen the speed of the sheave, however,is reduced, or when it stops altogether, the 'ring will then come intoengagement with the lubricating material and will retain a sutiicientamount thereof to provide for continuous lubrication while the sheave isin operation, and during such periods as the lubricating maA terial maybe out of contact with the ring.

rll`he lubricating material is preferably spread from the centralportion of the bearing member 21 where the same is applied uniformlyover the bearing member by means of curved groves extending from pointsnear the ends of the bearing member 21 towards the center and preferablycrossing each other on either side of the member,

as indicated in Fig. 4l. The ring 29, becausey of the tendency to bulgeinwardly in the manner described, maintains good contact with thebearinn` member, and, at the same time, coacts with the grooves to forcethe lubricating material outwardly through the grooves as the ringpasses thereover.

The casting of the hollow sheave necessarily leaves a certain amount ofsand, and other foreign matter, on the interior` thereof. Thelubricating material within the chamber loosens the sand, or othermaterial, from the interior of the chamber, and in the absence of thering would find its way to the bearing surface and injure the bearing.The ring made in accordance with my invention acts as a dam or filter toprevent the sand, or other foreign material in the lubricant7 fromreaching the bearing.

Anti-friction thrust washers 3i are preferably provided between the hubof the sheave and the side plates l0, as indicated in F ig. 3.

What we claim and desire to secure by Letters Patent of the UnitedStates is:

l. In a sheave block, a bearing member, a sheave having` a bearingaperture surrounding said member and provided with a chamber adapted tocontain lubricating material and an annular passage leading from saidchamber to said bearing member, the Width of the inner portion of saidannular passage being greater than the outer portion thereof,

and a ring formed of resilient iibrous material located in said passagefor conveying lubricating material from said' chamber to said bearingmember,

2. Iny a sheave block, a cylindrical bearingr member7 a sheave having acylindrical bearing a erture surrounding said member and provided with achamber adapted to contain lubricating material and an annular passageenlarged inwardly leading from said chamber to said bearing member, anda ring formed of resilient fibrous material located in said passage forconveying lubricating material from said chamber to said bearing member.Y

3. In a sheave block, a cylindrical bearing member, a sheave having acylindrical bear-V ing aperture surrounding said member and providedwith a chamber adapted to contain lubricating material and an inwardlyenlarged annular passage leading from said chamber to said bearingmember, and a felt ring compressed within said passage for conveyinglubricating material from said chamber to said bearing member.V

Y ERVIN SVAN.

DUF G. HANGES.

